Stud setter



May 4 9 I E. M. HOOVER STUD SETTER Filed June 23. 1924 l ATTOZEY.

Patented May 4, 1926.

UNITED- STATES i i I 1,583,554

PATENT f OFFICE.

EDWARD M..HoovER,oE ANDERSON, INDIANA, AssIGNoR TQYTHE vMANIIEAGTmmm EQUIPMENT COMPANY, 0E ANDEEsoN, INDIANA, A coRronA'rIoN (J1-INDIANA Y A Application led .June 23.

To all whom t may concern.' j Y `Be it known that I, EDWARD M. HOOVER, a citizen of the United States, residing at Anderson, in the county of Madison and State of Indiana, have invented a new and useful Stud Setter, of which the following is a specification.

My invention relates to devices for settlng stud bolts.

It is the objectof my invention to produce a stud setter which can be operated tov set stud bolts with ease and rapidity without requiring stopping or. reversal of the stud setter to grip and release these stud bolts.

The accompanying 4drawing illustrates my invention: Fig. l is a longitudinal section through a stud setter embodying my invention, with the jaws gripping a .stud bolt; Fig. 2 is a view` similar to Fig. 1, with the jaws in position to release the stud bolt; and Fi 3 is a section on the line 3-3 of Fig. 1.

` y. stud setter has two mating grlpping jaws 10 mounted in the hollow lower end 11 of a main carrying member l2, which may be supported for rotation ,in any suitable l vway, as by an upward supporting shank 18 by which it may be mounted in the rotating head of any suitable machine, such as a drillpress or lathe. The lower end 11 of the carrying member has alongitudinal bore 14 forreceiving the grippingj'aws 10, and the lower end orl mouth 15 of thisbore 14 is made conically flaring.'v The conically flaring mouth 15 co-operates .with xthe. outer surfaces 16 of the lower parts of the jaws 10, which outer surfaces 16 areV substantially, semi-conical. The upper ends of the -jaws 10 are substantially semi-,cylindrical exteriorly, and eX- f tend into the cylindrical part ofthe bore 14; but they do` not filly such bore, so that when the jaws -10 are loweredv in the carrying member 12, as indicated in Fig. 2, the jaw membersmay beseparated by'a considerable dis-` tance. Preferably a compression springv 17 is located in mating sockets inthe adjacent faces of the two jaws 10 to tend to separate such jaws. When the jaws 10 are forced upward into the borell, as indicated in Fig. 1, they are forced together against thespring 17, by the interaction of the conically flaring mouth 15 with the semi-conical surfaces 16. The two jaws 10 are preferably prevented from independent longitudinal movement kin the bore 14 in some suitable way, as by a sliding cross-pin 18 having a sliding lfity in STUD sETrER. f

19a-4.V serial No. 721,645.

mating transverseholes 19 in the upper ends of said jaws. The longitudinal'movement' of the jaws 10 in the carrying member 12 is limited in any suitable way,'conveniently byV a cross-key 20 passing through slots 21 in the walls of the carrying member 12 and through slots 22 in the jaws lO'between` the spring17 and the cross-pin 18. By havingv slots in both thecarrying member 12 and the jaws, such slots may be made shorter thank would be necessary if the same movement were provided with ,the slots vinfonly one of such members. To provide a finished exterior, as well as to hold the cross-key 20 in place, I

preferably provide an outersleeve 23, which surrounds thecar'rying member 12 land projects 4somewhat below the lower end thereof. This sleeve also effectively protects the jaws 10. This sleeve, however, is not essential to my invention.v A n At their joint lower end, the jaws lOare provided with an axial internal bore vhaving an internal screaw-thread 25, of whichhalf is in each jaw 10'.. The two halvesof this internal thread are relatively movable transverse to their axis, by the separation and coming n together ofthe ltwo jaws. The thread 25V corresponds to the thread 26 `on the stud-.bolt 27 which the stud setter is to handle for setting into a stud-receiving part 28. By the comin together of the Atwo jaws. 10, they gripthe t read 26 of av stud-bolt 27 inserted between Vvsuch jaws; while bythe separation of said jaws they release said stud-bolt. J Y ry.

In operation, any desired number of studbolts 27 may be started by hand into one or more stud-receiving plates 28. Then the stud setter is applied to such lstud-bolts separately. For thisv purpose, the stud setter is rotatably carried in any suitable way which stud-receiving member 28.` As the stud setter is depressed over any stud-,bolt 27 Vthe stud-.bolt pushes the twojaws 10, relatively upward in their supporting member 11and thus draws the two jaws together by the interaction ofthe surfaces 15 and 16. As such jaws come together, they grip between them the thread26 on the upper end of the stud-bolt 27, and do so without marring suchV thread. This is done while the stud'setter is in rotation. -In consequence, asv soonas .the gripping occurs, the studfbolt 27 starts to rotate, and is thus turned into vits threaded hole inthe stud-receiving member 28 as the stud setter descends. When the stud-bolt has advanced as far as desired, the operator stops the descent of the stud setter, and merely moves it back upward, withoutstopping its rotation unless that is desired :tor some other reason. As the stud setter is moved upward,v the jaws are drawn relatively downward in the carrying member l2 at lirst by the interaction oi' the threads 'and l26; and areA spread vapart by the spring 17 as permitted by the surfaces' l5 and 16. Byfsuch lspreading' apart, the jaws are released from thestud-bolt 27, leaving '5 the latter lin place, after which the stud setter may -freely be'liftedfvclear of such studbolt, and 'moved to another lstud-bolt all without stopping the forward rotation ofthe studsetter orrequiring its reverse rotation.

While I have shown only 'two jaws 10, each containing substantially half kof the thread 25, rmy invention is not limited toA this small number ofrj aws or to the Vpresence of so much of the :thread in vany :one jaw; vfor I'have shown two jaws merely as one simple'em- Vbodimentof the'invention, and the number of jaws jmay be'an'ything desired.

claim asmy invention: j 1.v A stud setter, comprising' a Yrotatable carrying member having a longitudinal bore, plurality lot jawsl mounted in said bore "and movable longitudinally thereof either direction by 4vforce' `longitudinally appli-ed, said jaws and said bore being provided `w'ithfmating =whol`ly conical tapered surfa'ceswhich produce relative transverse movement `between said jaws Aupon such longitudinal movement in said 'bore and being'rot'ationally drivingly interconnected so that turning roit said carrying Vmember always produces turning of said jawstherewith, and aspringt'ending toY separate said jaws Jtransversely, said'jafws having an vinternal thread i of--which-the parts Vare lrelatively ymovable by the relative transverse movement-J `oi: said jaws.

'2. A lst-ud setter, comprising a 'rotatable rcarrying member having a longitudinal bore, and a plurality-of jaws mounted in said bore and movablelongitudinally thereofv in either :direction by*v force longitudinally applied, 'said v'jaws and `said bore being pro,- vided `with matingwholly conical tapered surfaces which produce relative-transverse movementbetween said jaws'upon such longitudinal movement in saidbore and being lrotationally drivingly interconnected so that turning of said carrying Amember Yproduces turning ot-said jaws therewith, such llongitudinal movement of "the aws-in the bore being/independent -ofl-any 'turning' of the vjaws-in the bore, said-jaws having an internal thread of which the parts are relatively movable by the relative transverse movement-f of said jaws;

3. A stud setter, comprising a rotatable carrying member having va longitudinal bore, a plurality of jaws mounted in said bore and movable longitudinally thereof in either direction by force vlongitudinally applied, said jaws and said carrying member being .provided with means for causing such longitudinal movement of the jaws in said carrying member 'to 'be Vaccompanied bya transverse relative movement between ,the jaws and being always rotationallydrivingly inte'rconnected` 'independently of said lmeans, anda spring tending to separatesaid jaws transversely, said j aws having -anfinternal thread `ot' which -the parts are relatively movable byf the rel ative' transverse `movement of said jaws. I

4. A stud setter, comprising a rotatable carrying member having a longitudinalbore, and a ,plurality or jaws mounted Ainsaid bore and movable 4longitudinally thereof YAin either direction by -i'force longitudinally -applied, said Ijaws and said carrying lmember being provided with Ymeans lfor causingsuch longitudinalanovement@of :the aws `in said carrying ymember to A'be accompanied -by a transverse :relative movement Ibetween the jaws and :beinglrotationally..drivingly` interconnected -independentlyof said means, such longitudinal movement of I'the rjaws inthe bore being lindependent of any Ytur-ning of the .jaws in the bore, said jaws having Vlan internal thread of which theparts iare relatively Imovable Aby the relative transverse movement of said jaws. Y

5. A rstud setter, comprising a rotatable carrying member Ihaving a longitudinal bore, a plurality of jaws mounted in, said bore and movable longitudinally-thereof in either y direction -by force .longitudinally applied, said jawswand` sa'id carrying memberfbeing provided `with IVmeans forcausingsuch lon- Ygitud-inal movement 'of 4'the jaws in said carrying member to @be accompanied 1a transverse Irelative `movement :between the jaws `and lbeing* rotational'l-y `drivingly linterconnected'independently of said fmeans, such longitudinal movement ofthe jaws inthe bore being independent lof Yany :turningot' the jaws 'in @the bore, said jawshaving .an internal thread-A of which the vpart-s are relatively movable by -the :relative transverse movement -ofsaid aws, f andimeans for limitL ing the longitudinal movementaof said aws Vinsaidcarryingmember.l s w 6. A. stud setter, ycomprising fa :rotatable carryingfmember having a longitudinal bore,

a plurality -of ljaws mounted .1in -said ybore and movab-le :longitudinally thereof lineither direction by force longitudinally applied, said -fjawsfand said carrying member .being provided withimeans forcausing such ,lon gi- `tudinal Ymovement of the aws in said carrying -member to beaccompanied by .a vtransverse relatlve movement between ythe jaws lIO5 and being always rotationally drivingly in'- terconnected independently of said means, said jaws having an internal thread of which the parts are relatively movable by the relative transverse movement of said jaws, and means for preventing longitudinal movement of said jaws in said carrying member independently of one another.

7. A stud'setter, comprising a rotatable carrying member `having a longitudinal bore,

a plurality of jaws mounted in said bore.

and movable longitudinally thereof in either direction by force longitudinally applied, said jaws and said bore being provided with mating wholly conical tapered surfaces `which produce relative transverse movement between said jaws upon such longitudinal movement 1n sald bore, said jaws having an internal thread of which the parts arey relatively movable by the relative transverse movement oi said jaws, and a crossbar rotationally interconnecting said pair of .jaws to said carrying member and in vat least one. ofthem playing in wholly longitudinal slots.

8. A stud setter, comprising a rotatable carrying member having a longitudinal bore, a plurality of jaws mounted in said bore and movable longitudinally thereof in either direction by force longitudinally applied, said jaws and said bore being provided with mating wholly conical tapered surfaces which produce relative transverse movement between said jaws upon such longitudinal movement in said bore, such longitudinal movement of the jaws in the bore being independent of any turning 'of the jaws in the bore, said jaws having an internal thread of whichV the parts are relatively movable by the relative transverse movement of said jaws, and a cross-bar rotationally interconnecting said pair of jaws to said carrying member and in at least one' ofthem playing in slots which permit such longitudinal movement.

In witness whereof, I have hereunto set iny-hand at Indianapolis, Indiana, this 17th day of April, A. D. one thousand niney hundred andtwent -four.

' ED ARD M. HOOVER. 

